An insulated steam pipe having outside diameter of 30mm is to be covered with two layers of insulation, each having thickness of 20mm. the thermal conductivity of one material is 5 times that of the other. Assuming that the inner and outer surface temperatures of composite insulation are fixed, how much will heat transfer be increased when better insulation material is next to the pipe than it is outer layer?
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An insulated steam pipe having outside diameter of 30mm
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